CVE-2026-72835
filebrowser before v2.63.21 Access Rule Bypass via Path Canonicalization
- State
- Published
- Severity
- 7.6 High
- Published
- Aug 14, 2026
- Updated
- Aug 14, 2026
- Reserved
- Aug 10, 2026
Description
filebrowser versions before v2.63.21 fail to canonicalize paths before evaluating access rules, allowing authenticated users to bypass administrator-defined deny rules using case-variant or backslash-separated paths. Attackers can request files with alternate path representations that match no rule but resolve to the same filesystem object, gaining unauthorized access to denied files within their scope.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.6 High | CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.8 Medium | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N | VulnCheck |
Weaknesses
- CWE-41 Improper Resolution of Path Equivalence
Affected Products
| Product | Versions |
|---|---|
filebrowserfilebrowser |
|
References
- GitHub Security Advisory (GHSA-fgm5-pw99-w2p7)vendor-advisory
- VulnCheck Advisory: filebrowser before v2.63.21 Access Rule Bypass via Path Canonicalizationthird-party-advisory
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